Electronic fault finding system using acceptable limits testing



UH'USb] arv- Q PW Jan. 13, 1970 G SHAPIRO ET AL 3,490,041

ELECTRONIC FAULT FINDING SYSTEM USINGv ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 1 BEING P0; our TESTED REFERENCE SOURCE TRANSFORM/4 T/0N NETWORK COMPARATOR F" r I MODULE UNDER TEST I 28 I I TRANSFORMATION I NETWORK I l l PIP/ME 50 I l EQU/PMENT SOCKET I J 29 /1 PLUG 55 53 PROBE a INSTRUMENT INVENTORS Gus fave Shapiro Georye Rogers Owen .5. Law/y BY JMQQ 4 ATTORNEY Jan. 13, 1970 s pmo ET AL 3,490,041

ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING 24 Sheets-Sheet 5 Filed Aug. 28, .1964

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A 95mm w MQQQQS QEQQQHEB W7 WE E Y mm wk mm. aw wowbow QEQQQQESN wuzwwmmwm 9% I MQDQOE VI BS Jan. 13, 1970 Filed Aug. 28, 1964 G. SHAPIRO ET L ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING 24 Sheets-Sheet 6 WOVE/QSHOOT 752 A MODULE BEl/VG TESTED TRANSFORMflT/ON 55 NETWORK o g/ WCOMPARATOR i i A Max 001 MODULE T p177 BEING TESTED j TRANSFORMATION NETWORK 175 3 41 COMPARATOR Jan. 13, 1970 G. SHAPIRO ET AL 3,490,041

ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 7 RISE TIME MODULE L Z00 BEING TESTED NE TWORK 204 59 g 211 I [98 4 208 I 55 COMPAR/l T018 f L 40 j i 212 BEING TESTED I TRANSFORMATION 2i 219 NETWORK 2/7 205 fi g 2 (35 COM PA [2 ATOQ Jan. 13, 1970 ELECTRONIC Filed Aug. 28. 1964 3. H P o ET AL 3,490,041

24 Sheets-Sheet 8 A t 226 MODULE BEING 7. 5s TED l TRA NSFORMA TIO N NETWORK Z26 59 41 A-C Z REFERENCE coM ARmoR E VOLT/JG 35 LINEAR/TY SWEEP 250 f l GENERATOR BEING ,1, l TESTED TRANSFORMATION 245 Z46 NETWORK 241 f 244 39 41 40 253 L COMPARA TOR 55 55 j 25/ 49 Jan. 13, 1970 G. SHAPIRO ET AL 3,490,041

ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28. 1964 24 Sheets-Sheet 9 MODULE ,c 1 A ,c BEING o W TESTED TRANSFOQMA T/ON 277/ NETWORK 27 2 75 55 (044m 124 TOR Fzyt Z9 41 40 I m +A1 2 f F249 134 Fly. 18A

MODULE f i Af BEING 755750 TRANSFOQM/J T/ON NETWORK 261 263 FILTER 39 2622 41 2 40 FILTER COMPARATOR Fay 1a Jan. 13, 1970 s. SHAPIRO ET AL 3,490,041

ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 1O MODULE 7% :M BEING *0 TESTED TRANSFORMATION NETWORK Z82 l 2&

E ECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 11 29/ V0 [9 MODUL E BEING TESTED TRANSFORMATION NETWORK Z90 55 a; 40 35 COMPARATOR l] I sin 6 292 i Iain (e 5 2 2 7%,,

I sum O I I I 90 180 270 560 PHASE DIFFERENCE DEGREES Jan. 13, 1970 G.'SHAPIRO ET L 3,490,041

ECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 12 L MODULE W S BEING TEE TED TRANSFORMATION NETWORK 297 59 55 55 COMPARA T02? K 41 49 40 2 9 6 ERROR PHASE DIFFERENCE (DEGREES) O l Jan. 13, 1970 s. SHAPIRO E L E ECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING 24 Sheets-Sheet 14 Filed Aug. 28, 1964 Rm @R wa w WUWSQW RZWQQQU WORD mhwQ L QE 33:8

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ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 15 nww ww fi F WM. A win J IAN my mum I5 wwn own M bwow M 7 a 21mm an &m wmm q 1% M522 L m '1 www mmwfimwwial Z n E 41 q 33w 6 AJ @0555 Al W E mafia A1 womqmumfi Al mnw Qv A n n an now *3 M F QQ/AV iom 0 35 w P m n N won wzoiuwzzou mom w Q wzis mwomm can 0mm Q 24% mo. jwG NB um wt E 6i 3 mmwmw nwl H6 9853 @v NGEZQST WT @EIIQSQ zwmmbu mzwmm x k qwtzwmmmmfi E Jan. 13, 1970 s p o ET AL 3,490,041

LECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 17 l\ g 3 g @x E R in 9 g k f Jan. 13, 1970 e. SHAPIRO ETAI- 3,490,041

ECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING Filed Aug. 28, 1964 24 Sheets-Sheet 18 PAPER!) LL E L TRIGGERED BLOCK/N6 05C IL L A TOR TR A NSFORMA Tl 0N NETWORKS X y g 1 4 15 1e 10 9 12 24 25 T0 TERMINALS 0N SOC/(ET 54 T0 CELL 4 7'0 CELL C Jan. 13, 1970 G. SHAPIRO T AL Filed Aug. 28, 1964 24 Sheets-Sheet 19 VOLTAGE PLUG 51 0 '4 TIME- SAMPLING I I SWITCH 226 I I I I f0 t, TIME I ISAMPLING -INPUT c0MPAIe/s0NINPuT LEVEL LEVEL 1 LEVEL OF I DETECTORS 46,47 IN cELLs A To D I to L, 1'2; TIME I I I I I I l RELAYS 408 Z: 411 i {a 2 t 6 TIME I I I I INDICAT/NG AcTuA T/NG REL/W600 I to I {4 TIME I I INDICATOR LAMP 625 W629 I I t l 2 t3 t4 Fly? 284 Jan; 13, 1970 G. SHAPIRO ET L ELECTRONIC FAULT FINDING SYSTEM USING ACCEPTABLE LIMITS TESTING 24 Sheets-Sheet 2 0 Filed Aug. 28. 1964 Q WQQQQU Imp? QQQ 

